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1, knife-shaped plasma valve according to the different caliber made dark bar and screw in two forms (non-rising stem DN50~900mm, DN50~900mm valves), circular DC channel design out sediment, not blocking. Into the bottom of the cutter blade-shaped, soft materials, such as fiber, pulp and paper, wood pulp has cut off function, and has good opening and closing effects. Installed at the top of the cutter with stiff PTFE wiper prevents dust, gravel scrapes into packing boxes, can significantly improve the service life of the cutter. Valve plates made of stainless steel, grinding and polishing process to get the best seating. Compact design and occupy very little space, light weight, cheap, easy to install, perfect wear-preventing measures, ease of maintenance, ease of use and long life, and can choose any drive.